[mythtv-users] Will AC3 support on the HD-PVR improve playback performance?

[Mitch Gore]

On Mon, Sep 29, 2008 at 5:22 PM, Yeechang Lee <ylee at pobox.com> wrote:

> According to
> <URL:http://www.avsforum.com/avs-vb/showthread.php?t=1069799>, using
> ffmpeg to transcode the (currently two-channel) audio track on HD-PVR
> recordings into AC3--so the receiver does the decoding--improves
> playback.
>
> My Pentium 4 3.0 frontend can just (and I mean just) play the various
> 720p at 6Mbps sample recordings that are available, if I use the
> skiploopfilter patch. I intend to deploy my HD-PVR once the
> 5.1-supporting firmware's out and HD-PVR support's backported to 0.21,
> and will only record audio from my cable boxes via S/PDIF. Does this
> mean that--all else being equal--I should see a performance
> improvement versus my experience with the sample clips, given that all
> the audio will be in AC3 format passed straight through my soundcard
> to the receiver?
>
> --
> Yeechang Lee <ylee at pobox.com> | San Francisco CA US
> _______________________________________________
>

I have not used the HDPVR so theres my disclaimer...

technically speaking, yes it should reduce the required load.  Although, my
guess is the reduction will be quite low.  Decoding audio is a simple task
for today's processors.  So while it may make a difference, will it be
noticeable?  pry not IMHO.

Mitchell
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